Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Alaska planting zones

Alaska spans USDA zones 1a to 8b on the 2023 map; the most common is 5a. The typical last spring frost is around May 20 and the first fall frost around Sep 22.

Zone map of Alaska

Outside Alaska is dimmed · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

ZIP codes per zone

1a−60 to −55 °F51b−55 to −50 °F112a−50 to −45 °F272b−45 to −40 °F173a−40 to −35 °F183b−35 to −30 °F264a−30 to −25 °F314b−25 to −20 °F285a−20 to −15 °F335b−15 to −10 °F156a−10 to −5 °F46b−5 to 0 °F87a0 to 5 °F217b5 to 10 °F158a10 to 15 °F98b15 to 20 °F4

At a glance

ZIP codes272
Zones1a–8b
Typical last frostMay 20
Typical first frostSep 22

Largest cities in Alaska

Anchorage2a 3a 5a 5b 6b
Last frost May 1 · first Sep 29 · 25 ZIPs
Fairbanks2a 2b 3a 3b
Last frost May 28 · first Aug 26 · 10 ZIPs
Juneau6a 7a
Last frost Apr 20 · first Oct 22 · 6 ZIPs
Wasilla4b 5a
Last frost May 16 · first Sep 23 · 4 ZIPs
Kodiak7a 7b
Last frost Apr 29 · first Oct 14 · 3 ZIPs
Jber5a
Last frost May 9 · first Sep 26 · 2 ZIPs

Alaska extremes

From the 2023 zone data and NOAA 1991–2020 normals of the nearest station. One entry per town.

Mildest winters

highest zone

  1. Adak 995468b
  2. Atka 995478b
  3. Nikolski 996388b
  4. Dutch Harbor 996928b
  5. Akutan 995538a
  6. Tatitlek 996778a

Coldest winters

lowest zone

  1. Allakaket 997201a
  2. Beaver 997241a
  3. Circle 997331a
  4. Stevens Village 997741a
  5. Chalkyitsik 997881a
  6. Arctic Village 997221b

Longest growing season

median frost-free days

  1. Ward Cove 99928218 d
  2. Wrangell 99929202 d
  3. Hydaburg 99922201 d
  4. Port Alexander 99836198 d
  5. Metlakatla 99926192 d
  6. Ketchikan 99901189 d

Shortest growing season

median frost-free days

  1. Kasilof 9961075 d
  2. Soldotna 9966975 d
  3. Fairbanks 9970675 d
  4. Cantwell 9972977 d
  5. Denali National Park 9975577 d
  6. Cooper Landing 9957278 d

Wettest

precipitation per year

  1. Pelican 99832164.6 in
  2. Port Alexander 99836162 in
  3. Whittier 99693157.4 in
  4. Ward Cove 99928157.3 in
  5. Yakutat 99689140.4 in
  6. Angoon 99820128.1 in

Snowiest

snowfall per year

  1. Anchorage 99516162 in
  2. Cordova 99574151 in
  3. Yakutat 99689147 in
  4. Pelican 99832112 in
  5. Elfin Cove 99825110 in
  6. Anchor Point 99556101 in

Hottest summers

days at 90 °F or more

  1. Wasilla 996871 d
  2. North Pole 997051 d
  3. Delta Junction 997371 d
  4. Eagle 997381 d
  5. Tanacross 997761 d
  6. Hyder 999231 d

All places in Alaska

A

Adak · Akiachak · Akiak · Akutan · Alakanuk · Aleknagik · Allakaket · Ambler · Anaktuvuk Pass · Anchor Point · Anchorage · Anderson · Angoon · Aniak · Anvik · Arctic Village · Atka · Atqasuk · Auke Bay

B

Barrow · Beaver · Bethel · Bettles Field · Big Lake · Brevig Mission · Buckland

C

Cantwell · Central · Chalkyitsik · Chefornak · Chevak · Chicken · Chignik · Chignik Lagoon · Chignik Lake · Chitina · Chugiak · Circle · Clam Gulch · Clarks Point · Clear · Coffman Cove · Cold Bay · Cooper Landing · Copper Center · Cordova · Craig · Crooked Creek

D

Deering · Delta Junction · Denali National Park · Dillingham · Douglas · Dutch Harbor

E

Eagle · Eagle River · Eek · Egegik · Eielson Afb · Ekwok · Elfin Cove · Elim · Emmonak · Ester

F

Fairbanks · False Pass · Fort Greely · Fort Wainwright · Fort Yukon

G

Gakona · Galena · Gambell · Girdwood · Glennallen · Goodnews Bay · Grayling · Gustavus

H

Haines · Healy · Holy Cross · Homer · Hoonah · Hooper Bay · Hope · Houston · Hughes · Huslia · Hydaburg · Hyder

I

Iliamna · Indian

J

Jber · Juneau

K

Kake · Kaktovik · Kalskag · Kaltag · Karluk · Kasigluk · Kasilof · Kenai · Ketchikan · Kiana · King Cove · King Salmon · Kipnuk · Kivalina · Klawock · Kobuk · Kodiak · Kongiganak · Kotlik · Kotzebue · Koyuk · Koyukuk · Kwethluk · Kwigillingok

L

Lake Minchumina · Larsen Bay · Levelock · Lower Kalskag

M

Manley Hot Springs · Manokotak · Marshall · Mc Grath · Mekoryuk · Metlakatla · Meyers Chuck · Minto · Moose Pass · Mountain Village

N

Naknek · Napakiak · Nenana · New Stuyahok · Nightmute · Nikiski · Nikolai · Nikolski · Ninilchik · Noatak · Nome · Nondalton · Noorvik · North Pole · Northway · Nuiqsut · Nulato · Nunam Iqua · Nunapitchuk

O

Old Harbor · Ouzinkie

P

Palmer · Pedro Bay · Pelican · Perryville · Petersburg · Pilot Point · Pilot Station · Platinum · Point Baker · Point Hope · Point Lay · Port Alexander · Port Alsworth · Port Heiden · Port Lions · Prudhoe Bay

Q

Quinhagak

R

Rampart · Red Devil · Ruby · Russian Mission

S

Saint George Island · Saint Marys · Saint Michael · Saint Paul Island · Salcha · Sand Point · Savoonga · Scammon Bay · Selawik · Seldovia · Seward · Shageluk · Shaktoolik · Shishmaref · Shungnak · Sitka · Skagway · Skwentna · Sleetmute · Soldotna · South Naknek · Stebbins · Sterling · Stevens Village · Sutton

T

Takotna · Talkeetna · Tanacross · Tanana · Tatitlek · Teller · Tenakee Springs · Thorne Bay · Togiak · Tok · Toksook Bay · Trapper Creek · Tuluksak · Tuntutuliak · Tununak · Two Rivers · Tyonek

U

Unalakleet · Unalaska

V

Valdez · Venetie

W

Wainwright · Wales · Ward Cove · Wasilla · White Mountain · Whittier · Willow · Wrangell

Y

Yakutat

Questions

What planting zones are in Alaska?

Alaska spans USDA hardiness zones 1a to 8b on the 2023 map. The most common zone is 5a (33 of 272 ZIP codes).

When is the last frost in Alaska?

Across Alaska, the median last spring frost ranges from about Apr 4 to Jun 12 depending on location; the typical ZIP code sees it around May 20. Look up your ZIP code for a local date.